A) \[12\,\Omega \]
B) \[1.2\,\Omega \]
C) \[13\,\,\Omega \]
D) \[11\,\,\Omega \]
Correct Answer: A
Solution :
As we know that, \[R=\rho \frac{1}{a}\] \[\Rightarrow \] \[R=\rho \frac{{{1}^{2}}}{V}\] Here, V = volume \[R\propto {{l}^{2}}\] \[\Rightarrow \] If length is increased by 10% resistance is increases by almost 20% Hence, new resistance \[R'=10+20%\] of 10 \[=10+\frac{20}{100}\times 10=12\Omega \]You need to login to perform this action.
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